A pixel (short for picture element, using the common abbreviation “pix” for “picture”) is a single point in a graphic image. A Mega-Pixel camera contains one million pixels.
SPHERICAL VS. ASPHERIC LENSES
HOW THEY’RE USED IN IMAGING APPLICATIONS
Optical Lenses are often categorized by their shape. Two common surface shapes are spherical and aspherical. Each offers unique characteristics that make it suitable for different use cases.